GREENVILLE, SC - FEBRUARY 13: Republican presidential candidates (L-R) Donald Trump and Sen. Marco Rubio (R-FL) participate in a CBS News GOP Debate February 13, 2016 at the Peace Center in Greenville, South Carolina. Residents of South Carolina will vote for the Republican candidate at the primary on February 20. (Photo by Spencer Platt/Getty Images)

GREENVILLE, SC - FEBRUARY 13: Republican presidential candidate Ohio Governor John Kasich participates in a CBS News GOP Debate February 13, 2016 at the Peace Center in Greenville, South Carolina. Residents of South Carolina will vote for the Republican candidate at the primary on February 20. (Photo by Spencer Platt/Getty Images)

Ben Carson, retired neurosurgeon and 2016 Republican presidential candidate, speaks during the Republican presidential candidate debate sponsored by CBS News and the Republican National Committee at the Peace Center in Greenville, South Carolina, U.S., on Saturday, Feb. 13, 2016. Donald Trump tops the GOP field with support from 36.3 percent of likely South Carolina Republican primary voters with Ted Cruz at 19.6 percent, according to a poll conducted for the Augusta Chronicle released on Friday. Photographer: Daniel Acker/Bloomberg via Getty Images

GREENVILLE, SC - FEBRUARY 13: Republican presidential candidates Ben Carson (R) listens to a TV crew member as Donald Trump (L) smiles during a break of a CBS News GOP Debate February 13, 2016 at the Peace Center in Greenville, South Carolina. Residents of South Carolina will vote for the Republican candidate at the primary on February 20. (Photo by Spencer Platt/Getty Images)

2016 Republican Presidential candidates Donald Trump, president and chief executive of Trump Organization Inc., from left, Senator Marco Rubio, a Republican from Florida, and Ben Carson, retired neurosurgeon, stand on stage at the start of the Republican presidential candidate debate sponsored by CBS News and the Republican National Committee at the Peace Center in Greenville, South Carolina, U.S., on Saturday, Feb. 13, 2016. Donald Trump tops the GOP field with support from 36.3 percent of likely South Carolina Republican primary voters with Ted Cruz at 19.6 percent, according to a poll conducted for the Augusta Chronicle released on Friday. Photographer: Daniel Acker/Bloomberg via Getty Images

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"It's on me. I did not do well on Saturday night –– so listen to this –– that will never happen again," Rubio said to supporters following the New Hampshire primary. At the latest debate, candidates discussed the Iraq war, social security, and whether a new Supreme Court justice should be appointed before the election.

In one of the most-talked-about moments, Rubio claimed opponent Ted Cruz couldn't speak Spanish. Cruz then challenged Rubio in Spanish to comment on President Obama's executive orders in the language as well.

Only time will tell if his debate win will help him catch up to Trump, who leads him by almost 23 percent in the upcoming South Carolina primary.